Calculating Net Yield for Portuguese AL 2026: IRS, RNAL Costs and Real Numbers

Calculating Net Yield for Portuguese AL 2026: IRS, RNAL Costs and Real Numbers

Porto 6.8% gross yield, Lisbon 5.2%, Algarve 7.4%: these headline figures mask the real net return after Portuguese IRS, platform commissions, RNAL costs, insurance and maintenance. This guide walks through the full calculation with 2026 market data and a worked example, including GBP and USD context for UK and US buyers.

Calculating the net yield on a Portuguese Alojamento Local (AL) is fundamentally different from calculating the yield on a long-term rental. The calculation must account for variables unique to AL: seasonal occupancy swings, platform commissions of 15 to 18%, Portuguese IRS under Categoria B or Categoria F (which can mean a tax rate of 10% or 28% on the same income), and the higher operational costs of a property receiving guests in continuous rotation.

This guide uses 2026 market data for Lisbon, Porto and the Algarve and includes a full worked example so that UK and US investors can make an informed comparison against property investments in their home markets.

2026 market data: Lisbon, Porto and Algarve

Market	Average price per m2	Average daily rate (ADR)	Average annual occupancy	Estimated gross yield
Lisbon historic centre	EUR 4,800 / GBP 4,100 / USD 5,200	EUR 120 / GBP 103 / USD 130	74%	5.2%
Porto Baixa and Bonfim	EUR 3,200 / GBP 2,740 / USD 3,470	EUR 95 / GBP 81 / USD 103	68%	6.8%
Algarve (Albufeira, Lagos)	EUR 2,800 / GBP 2,400 / USD 3,040	EUR 140 / GBP 120 / USD 152	62%	7.4%
Lisbon emerging zones (Ajuda, Marvila)	EUR 3,100 / GBP 2,660 / USD 3,360	EUR 90 / GBP 77 / USD 98	61%	5.7%
Cascais and Estoril	EUR 4,200 / GBP 3,600 / USD 4,560	EUR 130 / GBP 111 / USD 141	65%	4.9%

Exchange rates used: 1 EUR = 0.857 GBP = 1.085 USD (rates indicative for 2026 planning purposes). Currency risk is a significant factor for UK and US buyers: a 10% sterling appreciation against the euro reduces the GBP-denominated yield by approximately 0.5 percentage points on a 5% gross yield property.

Gross yield vs net yield: the formula

Gross yield is calculated as:

Gross Yield = (ADR x Annual nights occupied) / Purchase price of property

Net yield requires subtracting all costs and taxes:

Net Yield = (Gross Revenue - Operating Costs - Portuguese IRS) / Purchase price

Operating costs in Portuguese AL divide into fixed and variable:

• Fixed annual costs: RNAL registration (EUR 150 initial, renewal varies), municipal tourism tax (EUR 2 per guest-night in Lisbon and Porto, variable in Algarve municipalities), property insurance including AL coverage (EUR 300 to 600 per year), condominium fees (typically 1 to 1.5% of property value annually), IMI property tax (0.3 to 0.45% of the taxed value for urban properties).
• Variable costs: Airbnb host fee (3% of booking value) or Booking.com commission (15 to 18%), cleaning per turnover (EUR 15 to 35 per clean, EUR 20 to 50 for larger properties), consumables (toiletries, coffee, paper), routine maintenance (1 to 2% of property value annually), property management fee if using a gestor de alojamento (10 to 20% of gross revenue).

Portuguese IRS on AL income: Categoria F vs Categoria B

The choice of tax regime is the single most impactful decision on net yield for Portuguese AL. The CIRS (Portuguese Income Tax Code) offers two routes:

Categoria F (passive rental income): applicable when the property is sub-let to an AL operator or when the tax authority classifies the activity as non-habitual. The tax rate is a flat 28% on net income (gross income minus deductible property expenses: mortgage interest, condominium fees, IMI and maintenance works). This is the higher-tax route but requires less administrative work.

Categoria B (commercial/business activity): applicable when the owner manages the AL directly. Under the simplified regime (regime simplificado), CIRS Article 31 applies a coefficient of 0.35 to gross revenue: only 35% of gross income is treated as taxable income. For EUR 20,000 gross revenue, the taxable base is EUR 7,000. Applying the 2026 marginal rate of 28.5% (applicable to income between EUR 20,000 and EUR 25,000) produces a tax of EUR 1,995, which is an effective rate of approximately 10% on gross revenue - versus 28% under Categoria F.

Categoria B requires opening an activity file with the Financas (tax authority), issuing recibos verdes (electronic receipts) and, above EUR 200,000 annual turnover, switching to organised accounting (contabilidade organizada). Below that threshold, the simplified regime is automatic.

For UK and US non-residents operating Portuguese AL without Portuguese fiscal residency, the Categoria B simplified regime is still accessible but requires appointing a fiscal representative (representante fiscal) in Portugal. The fiscal representative handles communications with the AT and the submission of the annual IRS declaration. Cost: typically EUR 300 to 600 per year for a basic service.

Worked example: two-bedroom apartment in Porto

Item	Annual amount (EUR)	Annual amount (GBP approx.)
Gross revenue (ADR EUR 92 x 240 nights)	22,080	18,900
Airbnb/Booking commission (average 16%)	-3,533	-3,027
Revenue after platform commission	18,547	15,875
Cleaning (EUR 35 x 80 turnovers)	-2,800	-2,400
Condominium + utilities paid by host	-2,400	-2,056
AL insurance	-420	-360
Porto tourism tax (EUR 2 x 240 nights)	-480	-411
Maintenance and consumables (1.2% of EUR 210,000)	-2,520	-2,160
RNAL and administrative costs	-350	-300
Net income before IRS	9,577	8,208
Portuguese IRS Cat. B (0.35 x 22,080 = 7,728 taxable, rate 26%)	-2,009	-1,722
Net income after IRS	7,568	6,486
Net yield on purchase price (EUR 210,000)	3.6%	3.6%

The net yield of 3.6% compares against a gross yield of approximately 10.5% on the same property. The difference is explained by operating costs (which are significantly higher in AL than in long-term rental) and Portuguese IRS. For UK buyers, 3.6% net compares favourably against typical buy-to-let net yields in London of 2.5 to 3.2% after agent fees and income tax at 40%. For US investors, 3.6% net in Porto compares against US urban rental net yields of 3 to 4.5% in equivalent cities.

Non-resident tax considerations for UK and US owners

Non-residents who are not fiscally resident in Portugal face a key difference: the flat rate of 28% applies to Categoria B income (not the graduated scale used for residents). This removes the benefit of the lower marginal rates and means the effective tax rate under Categoria B simplified regime for a non-resident is approximately 28% x 0.35 = 9.8% of gross revenue, which is still very competitive.

Under Categoria F (if the non-resident is taxed as passive rental income), the rate is also 28% but applied to net income after property-specific deductions. The comparison between the two regimes should be modelled with actual numbers by a Portuguese TOC (certified accountant) or tax lawyer (advogado fiscal).

The UK-Portugal Double Tax Convention (Convention 1994) prevents double taxation of Portuguese AL income. UK residents declare the Portuguese income on their UK Self Assessment return and claim Foreign Tax Credit for the Portuguese IRS paid. The Portuguese IRS paid reduces the UK income tax liability pound for pound (up to the UK tax rate on the same income). For US citizens, the US-Portugal tax treaty (signed 1994) works similarly: Portuguese income is declarable on the US federal return and a foreign tax credit is available to offset the Portuguese IRS paid.

Algarve seasonal profile: the yield calculation differs

The Algarve has an extreme seasonal occupancy profile: 85 to 95% occupancy in July and August, falling to 15 to 25% in January and February. Revenue concentrates in 4 to 5 months. For a two-bedroom property in Albufeira purchased for EUR 200,000 (approximately GBP 171,400 / USD 217,000):

• Estimated gross annual revenue: EUR 19,600 (ADR EUR 130 x 151 high-season nights + ADR EUR 60 x 50 low-season nights).
• Operating costs: EUR 9,200 (higher in Algarve due to pool and garden maintenance).
• Portuguese IRS Categoria B simplified (0.35 coefficient): taxable base EUR 6,860, estimated tax EUR 1,784.
• Net yield: (19,600 - 9,200 - 1,784) / 200,000 = 4.3% (approximately GBP 7,475 / USD 9,348 annual net income).

The Algarve delivers higher net yields than Lisbon but requires greater financial resilience: 2 to 3 months of very low revenue mean the owner needs reserves to cover fixed costs (condominium fees, insurance, IMI) during winter. For UK and US investors with mortgages in EUR, currency conversion costs during low-revenue periods add an additional layer of cash-flow management.

Total cost of ownership for non-resident buyers

Beyond the annual yield, the acquisition cost for non-residents includes IMT (Imposto Municipal sobre Transmissoes), which is 6 to 7.5% for properties above EUR 297,000 in 2026, Imposto de Selo of 0.8% on the contract value, notarial fees (EUR 500 to 1,500) and, if financed, mortgage arrangement costs. Portuguese banks typically require a 30 to 40% deposit from non-residents, with loan-to-value ratios of 60 to 70%.

Adding IMT at 6.5% and IS at 0.8% to a EUR 210,000 Porto apartment raises the effective purchase cost to approximately EUR 225,500. The net yield drops from 3.6% to 3.36% on the total cost basis. Payback period (assuming 3.4% constant net yield, excluding capital appreciation) is approximately 29 to 30 years.

For a complete guide to buying property in Portugal as a non-resident and the CPCV process, see our article on buying Portuguese property as a foreigner. For tax treaty details between the UK and Portugal, see UK-Portugal double tax treaty and short-term rental income 2026.